Quick answer

Match the sheet to your mattress type—cradle or crib—and wash it in cool water on a gentle cycle, then air-dry or tumble low. This keeps double muslin soft and helps prevent shrinking.

Why muslin feels different and what that means for fit

Double muslin is breathable and soft, but its loose weave can relax slightly with use. A snug fit at the corners is normal and helps the sheet stay flat. If the sheet feels tight straight from the pack, it will likely settle after the first wash. Always check that the sheet lies flat without bunching under your baby.

Cradle vs. crib: choose the right sheet

A newborn cradle fitted sheet is smaller and designed for bassinet or cradle mattresses, while a baby fitted sheet fits standard crib mattresses. Using the wrong size can create loose fabric or make the sheet hard to stretch over the corners. Measure your mattress length and width before ordering if you are unsure.

How to prevent shrinking and keep softness

Muslin can shrink if washed hot or dried on high heat. Stick to cool water and low heat, and avoid overloading the machine. If you notice the sheet shrinking after wash, stretch it gently while damp to help it return to shape. Line drying in the shade preserves the fabric best.

Step-by-step: sizing and washing your muslin fitted sheet

  1. Measure your mattress: Use a tape measure to record the length, width, and depth of your cradle or crib mattress. Compare these to the sheet's stated dimensions—if not listed, check the product page or contact support. A sheet that is too small will not stretch over the corners; too large will bunch.
  2. Choose the right sheet for your bed type: Select a newborn cradle fitted sheet for bassinets and cradles, and a baby fitted sheet for standard cribs. Do not size up to allow for shrinkage; buy the correct size and follow care instructions. Using a crib sheet on a cradle mattress creates dangerous loose fabric.
  3. Wash before first use: Machine wash the sheet separately in cool water on a gentle cycle with a mild detergent. Avoid bleach and fabric softener, which can reduce absorbency and breathability. Pre-washing removes manufacturing residues and helps the fabric settle.
  4. Dry carefully to prevent shrinking: Tumble dry on low heat or line dry in the shade. Remove promptly when slightly damp and stretch the edges gently to reshape. Never dry on high heat. High heat is the main cause of shrinking in muslin.
  5. Fit the sheet snugly: Pull the sheet over all four corners, ensuring the elastic or stretch corners are fully under the mattress. Smooth out any wrinkles. The sheet should be taut with no loose areas. A loose sheet can pose a suffocation risk—always check fit before placing your baby.
  6. Check fit regularly: After each wash, re-check that the sheet still fits securely. If it becomes loose or worn, replace it. Rotate between two sheets to reduce wear. Elastic can weaken over time; replace sheets that no longer grip.

Product facts